package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkSpaceService;
import com.sky.vo.*;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.validation.constraints.Min;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkSpaceService workSpaceService;

    /**
     * 统计指定时间区间内的营业额数据
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> DateList = new ArrayList<>();

        DateList.add(begin);

        while (!begin.equals(end)) {
            //日期计算
            begin = begin.plusDays(1);
            DateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : DateList) {
            //查询营业额（已经完成订单合计）
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);//一天的开始的时刻
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);//一天的结束时刻

            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status",5);

            //select sum(amount) from orders
            // where order_time>begin and order_time<end and status = 5
            Double turnover =  orderMapper.sumByMap(map);

            turnover =  turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }



        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(DateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();

    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getuserStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> DateList = new ArrayList<>();

        DateList.add(begin);

        while (!begin.equals(end)) {
            //日期计算
            begin = begin.plusDays(1);
            DateList.add(begin);
        }
        //总用户
        //select count(id) from user where createTime>begin and createTime<end
        List<Integer> totalUserList = new ArrayList<>();
        //每天注册用户的数量
        //select count(createTime) from user
        // where createTime>begin and createTime<end
        List<Integer> newUserList = new ArrayList<>();
        for (LocalDate date : DateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);
            //总数量
            Integer total = userMapper.countByMap(map);

            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(total);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(DateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> DateList = new ArrayList<>();

        DateList.add(begin);

        while (!begin.equals(end)) {
            //日期计算
            begin = begin.plusDays(1);
            DateList.add(begin);
        }

        List<Integer> ordersCountList = new ArrayList<>();//每天订单总数
        List<Integer> validOrderList = new ArrayList<>();//每天有效订单
        for (LocalDate date : DateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询每天的订单总数 select count(id) from order where order_time > ? and order_time < ?
            Integer ordersCount = getOrderCount(beginTime, endTime, null);

            //查询每天有效订单总数 select count(id) from order where order_time > ? and order_time < ? and status = ?
            Integer validOrder = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            ordersCountList.add(ordersCount);

            validOrderList.add(validOrder);
        }
        //订单总数
        Integer totalOrdersCount = ordersCountList.stream().reduce(Integer::sum).get();
        //有效订单
        Integer validOrdersCount = validOrderList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate = 0.0;

        if (totalOrdersCount != 0) {
            //订单完成率
            orderCompletionRate = validOrdersCount.doubleValue() / totalOrdersCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(DateList,","))
                .orderCountList(StringUtils.join(ordersCountList,","))
                .validOrderCountList(StringUtils.join(validOrderList,","))
                .totalOrderCount(totalOrdersCount)
                .validOrderCount(validOrdersCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 统计指定时间区域内的效率排序前10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numbersList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numbersList)
                .build();


    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1.查询数据库，获取营业数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);


        BusinessDataVO businessDataVO = workSpaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
        //2.通过POI,将数据写入到excel文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");


        try {
            //基于模板文件创建一个新的excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格标签页
            XSSFSheet sheet = excel.getSheet("sheet1");

            //填充数据---时间
            sheet.getRow(1).getCell(1).setCellValue("时间"+dateBegin +"至" +dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某天的营业数据
                BusinessDataVO businessData = workSpaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //获取某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }


            //3.通过输出流，将excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }



    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status",status);


        return orderMapper.countByMap(map);
    }
}
